Physics 2 Online Quiz 2: Work, Energy, Power

15 Questions  I  By Sir_july
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Physics Quizzes & Trivia
This quiz includes the topics on Work, Energy and Power. The quiz is consisting of 15 multiple-choice items, which are all conceptual. Time limit for the quiz is 15 minutes. Good luck.

  
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  • 1. 
    Which of the following is not a unit for power?  
    • A. 

      Joule – second

    • B. 

      Watt

    • C. 

      Newton-meter per second

    • D. 

      Horsepower


  • 2. 
    Car A has a mass of 1000 kg and a speed of 60 km/h, and car B has a mass of 2000 kg and a speed of 30 km/h.  The kinetic energy of car A is _____.  
    • A. 

      Half that of car B

    • B. 

      Equal that of car B

    • C. 

      Twice that of car B

    • D. 

      Four times that of car B


  • 3. 
    If an object has kinetic energy, then it also must have _____.     
    • A. 

      Speed

    • B. 

      Impulse

    • C. 

      Acceleration

    • D. 

      Force


  • 4. 
    A feather and a coin are dropped in the air.  Each falls with equal _____.
    • A. 

      Momenta

    • B. 

      Kinetic energies

    • C. 

      Potential energy

    • D. 

      None of the above


  • 5. 
    When a bullet is fired from a rifle, the force on the rifle is equal to the force on the bullet.  However, the energy of the bullet is greater than the energy of the recoiling rifle because the _______.  
    • A. 

      Force on the bullet acts for a longer distance

    • B. 

      Bullet's momentum is greater than that of the rifle

    • C. 

      Force on the bullet acts for a longer time

    • D. 

      The impulse of the bullet is more


  • 6. 
    An object that has kinetic energy must be _____.
    • A. 

      Moving.

    • B. 

      Falling.

    • C. 

      At an elevated position.

    • D. 

      At rest.


  • 7. 
    An object that has potential energy has this energy because of its _____.  
    • A. 

      Speed.

    • B. 

      Acceleration.

    • C. 

      Momentum.

    • D. 

      Location.


  • 8. 
    An object is raised above the ground gaining a certain amount of potential energy.  If the same object is raised twice as high it gains _____.
    • A. 

      Four times as much potential energy.

    • B. 

      Twice as much potential energy.

    • C. 

      Half as much potential energy

    • D. 

      Neither of these.


  • 9. 
    When an object is lifted 10 meters, it gains a certain amount of potential energy. If the same object is lifted 20 meters, its potential energy is ______.
    • A. 

      Less.

    • B. 

      The same

    • C. 

      Twice as much.

    • D. 

      Four times as much


  • 10. 
    Two identical arrows, one with twice the kinetic energy of the other, are fired into a hay bale.  The faster arrow will penetrate _____.
    • A. 

      The same distance as the slower arrow.

    • B. 

      Twice as far as the slower arrow.

    • C. 

      Four times as far as the slower arrow.

    • D. 

      More than four times as far as the slower arrow.


  • 11. 
    A ball is projected into the air with 100 J of kinetic energy which is transformed to gravitational potential energy at the top of its trajectory.  When it returns to its original level after encountering air resistance, its kinetic energy is _____.   
    • A. 

      Less than 100 J.

    • B. 

      More than 100 J.

    • C. 

      100 J.

    • D. 

      Not enough information given.


  • 12. 
    Strictly speaking, a car will burn more gasoline if the car radio is turned on.  This statement is _____.
    • A. 

      Totally false.

    • B. 

      True only if the car's engine is running.

    • C. 

      True only if the car's engine is stopped.

    • D. 

      Always true.


  • 13. 
    Two identical arrows, one with twice the speed of the other, are fired into a hay bale.  The faster arrow will penetrate _____.
    • A. 

      The same distance as the slower arrow.

    • B. 

      Twice as far as the slower arrow.

    • C. 

      Four times as far as the slower arrow.

    • D. 

      More than four times as far as the slower arrow.


  • 14. 
    How many Joules of energy are in one kilowatt-hour?
    • A. 

      1 J

    • B. 

      60 J

    • C. 

      60 kilojoules

    • D. 

      3.6 megajoules


  • 15. 
    A feather and a coin dropped in a vacuum fall with equal _____.
    • A. 

      Forces

    • B. 

      Momenta

    • C. 

      Accelerations

    • D. 

      Kinetic energies


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